COWAY Air Purifiers: 810-SF Testbed… Allergy Relief So Surprising! We recently tested the COWAY Air Purifier in a 810-square-foot bedroom, and the results were remarkable. Its True HEPA filter swiftly tackled smoke, pet dander, and odors, noticeable even after our furry friend’s morning zoomies. The AQI monitor provided real-time air quality feedback, while the Auto & Sleep modes ensured quiet operation. We appreciated the timer function for energy efficiency and the filter indicator for maintenance reminders. The integrated night light was a thoughtful touch, eliminating the need to switch on harsh overhead lights. With a 3-year warranty and sleek black design, this purifier blends reliability with style. While we’ve used 100 Black models, we’re impressed by its consistent performance across the line. Allergy sufferers, take note—it delivers relief that’s truly surprising.